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hard start problems
vise grips Take a pair and clamp of the supply line at the rear of the head when you turn the engine off. Let it sit overnight and try to start it the next day. If it starts right up pull the pliers off. That means you have a leak on the supply side. Install a oneway check valve in the line...- hdsidehack
- Post #14
- Forum: 5.9L 12 valve Cummins
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hard start problems
leak down (cracked fuel line, leak in the fuel pre-heater, & overflow valve) what the check valve does is stop the reverse flow of fuel back to the tank vacuum leaks can be hard to find much rather chase a high pressure leak (wet fuel line, wet fittings, & extra dirt migrating to the area)...- hdsidehack
- Post #12
- Forum: 5.9L 12 valve Cummins
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hard start problems
sounds like you have a leak down problem air in the fuel? try installing a check valve on the rubber fuel line behind the fuel filter these check valves are directional ---> btw don't install it on the return line lol this will stop the siphon effect of trying to return the fuel to the tank- hdsidehack
- Post #10
- Forum: 5.9L 12 valve Cummins
